NHTSA ID Number: 11017282
Manufacturer Communication Number: B640525
TSB/Document Date: 2025-04-28
Summary
Customer states that the output air from one of the vehicle vent assemblies doesn’t match the desired temperature, nor change from Hot/Cold.
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TSB/Document ID: B640525
- Identifier the manufacturer uses to identify the communication and the way it can be located by those searching for it.
Replacement Service Bulletin Number:
- Replacement service bulletin number.
MFR Communication Date: 2025-04-21
- Date the communication was disseminated by the manufacturer.
MFR Internal Campaign ID/Software Version:
- Manufacturer's unique identifier for the service campaign if this communication is a related one.
Communication Type: Service Bulletin/Repair Instructions
- Service Bulletin / Repair Instructions - Service Campaign - Warranty Program / Extension - Over The Air - Emissions - Other
NHTSA Components: STRUCTURE:BODY
- NHTSA Component(s) of the products involved in communications.
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4/28/25, 2:15 PM 64 05 25_HVAC FLAP LINKAGE NOT FULLY CONNECTED SIB 64 05 25 HVAC FLAP LINKAGE NOT FULLY CONNECTED 2025-04-21 This Service Information Bulletin (Revision #1) replaces SI B64 05 25 dated April 2025. What’s New (Specific text highlighted): Procedure Section updated MODEL E-Series G45 Model Description X3 Sports Activity Vehicle Production Date Vehicles produced up to January 2025 SITUATION Customer states that the output air from one of the vehicle vent assemblies doesn’t match the desired temperature, nor change from Hot/Cold. CAUSE The air flap linkage may not be fully locked into the air mixing flap. CORRECTION Check that the linkage has not come loose from the flap in the heating, ventilation, and air conditioning (HVAC) system. See attached video BV64 02 25 G45 Flap Linkage There is a push-in end on the linkage that can be reinserted into the flap and fully seated. Copyright ©2025 BMWof North America, Inc. about:blank 1/5 4/28/25, 2:15 PM 64 05 25_HVAC FLAP LINKAGE NOT FULLY CONNECTED Check that the linkage has not come loose from the HVAC flap for the zone that is malfunctioning. There is a white plastic mechanism that connects the black linkage arm and the HVAC flap assembly. To test if the mechanism is fully seated into the HVAC flap assembly, perform a wiggle test of the white plastic (in/out). Here you can see the white plastic mechanism has backed out of the HVAC case and is not locked into the flap. See video attached to the bulletin. If using a borescope to inspect if the flap is fully locked into the linkage, you can see the White plastic mechanism push pin mushroom shaped end must engage into the flap by being pushed in until it fully goes past the plastic flap ramp. The pictures below show fully locked in vs not fully locked. PROCEDURE See attachment for the Procedure. Check that the linkage has not come loose from the HVAC flap. There is a white plastic mechanism that connects the black linkage arms and the HVAC flap assembly. To test if the mechanism is fully seated into the HVAC flap assembly perform a wiggle test of the white plastic (in/out). Copyright ©2025 BMW
of North America, Inc.
about:blank
1/5
4/28/25, 2:15 PM
64 05 25_HVAC FLAP LINKAGE NOT FULLY CONNECTED
Check that the linkage has not come loose from
the HVAC flap for the zone that is
malfunctioning.
There is a white plastic mechanism that
connects the black linkage arm and the HVAC
flap assembly.
To test if the mechanism is fully seated into the
HVAC flap assembly, perform a wiggle test of
the white plastic (in/out). Here you can see the
white plastic mechanism has backed out of the
HVAC case and is not locked into the flap.
See video attached to the bulletin.
If using a borescope to inspect if the flap is fully locked into the linkage, you can see the White
plastic mechanism push pin mushroom shaped end must engage into the flap by being pushed in
until it fully goes past the plastic flap
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